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3 years ago

Solve the equation 6+7r=97

Mathematics

2 answers:

worty [1.4K]3 years ago

5 0

6 + 7r = 97 equals r = 13

allsm [11]3 years ago

3 0

Answer:

R=13

7x13=91

91+6=97

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Work the following financial transactions. Your station charges $15.95 for a lubrication job. As a promotion you sell six coupon

liq [111]

Answer:

16.4%

Step-by-step explanation:

We know that a station charges $15.95 for a lubrication job and as a promotion sell six coupons were sold for lubrication jobs for $80.

We are to find the percentage discount that was being offered on purchase of 6 coupon lube book.

Original price of 6 coupons = 6 × 15.95 = $95.7

Difference in prices = 95.7 - 80 = $15.7

Percentage discount = 15.7/95.7 = 16.4%

8 0

3 years ago

Create an exponential to describe $100 at 2% interest, compounded annually, for x years. y=100(.98)^x y=100(.8)^x y=100(1.2)^x y

zysi [14]

The exponential to describe $100 at 2% interest, compounded annually, for x years is $y=100(1.02)^{x}$

<h3>Solution:</h3>

Given that $ 100 at 2 % interest , compounded annually for "x" years

The formula for compound interest, including principal sum, is:

$A=P\left(1+\frac{r}{n}\right)^{n t}$

A = the future value of the investment/loan, including interest

P = the principal investment amount (the initial deposit or loan amount)

r = the annual interest rate (decimal)

n = the number of times that interest is compounded per unit t

t = the time the money is invested or borrowed for

Here in this sum,

P = $ 100

$r = 2 \% = \frac{2}{100} = 0.02$

number of years = x

Here given that compounded annually , so n = 1

Let "y" be the amount after "x" years

Substituting the values in formula we get,

$\begin{aligned}&y=100\left(1+\frac{0.02}{1}\right)^{1 \times x}\\\\&y=100(1+0.02)^{x}\\\\&y=100(1.02)^{x}\end{aligned}$

Thus the exponential to describe is $y=100(1.02)^{x}$

5 0

4 years ago

Please help me I am really stuck

noname [10]

You would set up a proportion for people that choose beach/ total
So (14+17+19)/(50+50+50) which simplifies to 50/150 or 1/3
From here we can set 1/3 = x/1200 and solve for x
To do this we would multiply each side by 1200 to isolate x

(1/3)×1200= 400
So x=400
Therefore, 400 people can be expected to pick the beach

5 0

4 years ago

My very last last assignment and I NEEDD HELP ASAP

storchak [24]

Answer:

51.575

Step-by-step explanation:

$s = \frac{9 + 12 + 17}{2} = 19$